Jacques francois marie crolard



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Patented Jan. 27, 1931 UNITED STATES PATENT OFFICE JACQUES FRANCOISMARIE CROLARD, OF WESTMINSTER, ENGLAND, ASSIGNOR TO BRITISH-AMERICANTOBACCO COMPANY, LIMITED, OF IAONDON, ENGLAND, A

BRITISH COMPANY MANUFACTURE AND PRODUCTION OF CIGARETTE PAPER NoDrawing. Application filed January 29, 1930, Serial No. 424,454, and inGreat Britain April 3, 1929.

My invention relates to improvements in the manufacture and productionof paper for cigarettes, and has for its object to provide a cigarettepaper which is free from the tendency to become discoloured, stained orspotted by the fixed or volatile oils of the tobacco contained in thecigarette.

According to my invention I incorporate in the cigarette paper a greasyor fatty matter such for example as palmitin, stearin, or the like, thesaid process of incorporation being effected by precipitation into thepulp Example In a boiler of sufiiciently large capacity a mixturecomposed of: water, 1000 litres; boraX, 25 lnlograms; and stearin, 50'kilograms, is maintained at boiling for abou The temperature of thewater is raised to boiling point so that the borax will be dissolved andthen stearin is added, preferably The boiling should be continued untila few drops of the solution diluted in a large quantity of water give anopalescent solution without any grain, say in about three hours.

It is preferred to use indirect heating rather than to allow the steamto enter into the boiler direct. If, however, the latter method be usedallowance should be made for the condensation of the steam by reducingthe volume of water at the beginning of the operation. The solution isallowed to cool until it reaches a temperature of 40 centigrade, inwhich stateit can be used, but care must be taken that there be nodeposit.

The solution so obtained is placed either minium sulphate,calciumchloride or an acid dissolved in hot water is added about an hourbefore running ofi the paste contained in the beater according to thequality or kindof the cigarette paper required, for example whethercombustible or non-combustible.

Having now particularly described and ascertained the nature of my saidinvention a and in what manner the same is to be performed, I claim 1.The manufacture and production of cigarette paper to render the samefree from the tendency to become discoloured, stained or spotted aftercontact with tobacco, by the incorporation with cigarette paper duringor after the manufacture of the said paper, of a greasy or fatty matter.

2. In the manufacture of cigarette paper In testimony whereof I havesigned I name to this specification.

' JACQUES FRANCOIS MARIE CROLARD.

